That is ridiculous and unacceptable. People like that are what make buying on eBay so risky. Hopefully you paid with Paypal and can file a dispute for your money back. Contact the seller directly and tell them that you want a full refund and a return shipping label. If they refuse, contact eBay. At best, what you should get is your purchase price and shipping refunded and just keep the razor. At worst, you'll be stuck in the middle of a dispute war for quite some time.
Ahead lie many fantastic shaves & AD's...But by appreciating #1, you justify #2!